Submission #882530

#	Time	Username	Problem	Language	Result	Execution time	Memory
882530		alexdd	Crazy old lady (IZhO13_crazy)	C++17	100 / 100	5 ms	500 KiB

crazy

#include<iostream>
using namespace std;
int n;
int p[1005];
bool occupied[1005];
bool verif(int lady)
{
    for(int i=1;i<=n;i++)
        occupied[i]=0;
    occupied[p[1]]=1;
    int assigned=0;
    for(int i=2;i<=n;i++)
    {
        assigned++;
        if(assigned==lady) assigned++;
        if(!occupied[assigned])
        {
            if(p[i]!=assigned)
                return 0;
            occupied[p[i]]=1;
        }
        else
        {
            if(p[i]==assigned)
                return 0;
            occupied[p[i]]=1;
        }
    }
    return 1;
}
signed main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);
    int t;
    cin>>t;
    while(t--)
    {
        cin>>n;
        for(int i=1;i<=n;i++)
        {
            cin>>p[i];
        }
        int unde=-1;
        for(int i=1;i<=n;i++)
        {
            if(verif(i))
            {
                //cout<<i<<" ";
                //continue;
                if(unde==-1)
                    unde=i;
                else
                {
                    unde=0;
                    break;
                }
            }
        }
        //cout<<"   zzz\n";
        cout<<unde<<"\n";
    }
    return 0;
}

• Subtask 1: 100 / 100